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Elastic pbar-p with Coulomb and hadron scatterings [message #8166]

Wed, 01 April 2009 18:56

Aida Galoyan
Messages: 79
Registered: May 2007
Location: Dubna

continuous participant

From: *jinr.ru

Hi all,

I have calculated 100000 Events of pbar-p elastic scatterings
with Coulomb, Interference and hadron scatterings at different
energies within new DPM generator. The output-root files are
disposed in lxi00X.gsi.de in public directory:
/d/panda02/elastic

Using the files, one can check response of barrel part on
recoil protons and forward part on elastic scattered
antiprotons.

Aida

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8179 is a reply to message #8166]

Mon, 06 April 2009 09:20

Tobias Stockmanns
Messages: 489
Registered: May 2007

first-grade participant

From: *ikp.kfa-juelich.de

Dear Aida,

this are good news. Can you upload your code to the SVN of pandaRoot so that we can use the generator directly?

Thank you in advance,

Tobias

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8182 is a reply to message #8179]

Mon, 06 April 2009 14:59

Aida Galoyan
Messages: 79
Registered: May 2007
Location: Dubna

continuous participant

From: *jinr.ru

Dear Tobias,

Hadron elastic scattering is presented in the version of DPM installed in Panda-Root.
It is the most essential part of elastic scattering for Panda.
The Coulomb scattering will give contribution at very forward
direction, and recoil very slow protons in the barrel part.

First of all, we are interested in testing of the
full elastic scattering (Coulomb, interference, hadron parts)
algorithm, and proccesing of the generated files with elastic scattering. We would like to see the results of full simulation with elastic scattering.

An installation of DPM with full elastic scattering is now complicated, because it is required to point out the minimal angle of the Coulomb scattering. However, there is PndDpmDirect class installed by Mohhamad with initial parameters without minimal angle. If I include the new version of the DPM there will be a contractiction with PndDpmDirect class.
Therefore, without coordination with PndDpmDirect class I can not insert new variant of the DPM.

I hope my generated files will be useful for you.
Aida

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8183 is a reply to message #8182]

Mon, 06 April 2009 15:30

Tobias Stockmanns
Messages: 489
Registered: May 2007

first-grade participant

From: *ikp.kfa-juelich.de

Dear Aida,

thank you for your reply.

The generated files are very useful for us and Tsito will use them extensively once he is back from vacation.

Nevertheless it would be nice if these files could be produced directly and I think we should address this once Mohammad is back.

Cheers,

Tobias

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8701 is a reply to message #8183]

Wed, 27 May 2009 15:01

Miriam Fritsch
Messages: 8
Registered: March 2009
Location: Uni Mainz

occasional visitor

From: *kph.uni-mainz.de

Hi Tobias,

do you know what the status is ?? Did you ask Mohammed about inserting the minimum angle in the PndDpmDirect class in order to make the coulomb scattering available in svn ??

Cheers,

Miriam

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8702 is a reply to message #8701]

Wed, 27 May 2009 15:04

Tobias Stockmanns
Messages: 489
Registered: May 2007

first-grade participant

From: *ikp.kfa-juelich.de

Dear Miriam,

I am sorry, but I have not contacted Mohammad about this problem. Hopefully he sees now this thread and is able to respond to it Very Happy

.

Cheers,

Tobias

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8804 is a reply to message #8166]

Fri, 05 June 2009 10:35

Mathias Michel
Messages: 21
Registered: May 2009
Location: Mainz

occasional visitor

From: *kph.uni-mainz.de

Hi,

my name is Mathias Michel, i'm writing my diploma in Mainz about the luminosity monitor system for Panda and i am new to this forum, so hello everybody Smile

I tested the Dpm-file with the elastic scattering at 6,2GeV and it seems to me that there is an minimum angle at about 5mrad and there are no events for smaller angles.
So am i right with the minimum angle and if yes in which angles does the new Dpm generate elastic Events?

It would be helpful to simulate elastic events down to 2.8mrad, is this possible with the Dpm?

Cheers,

Mathias

[Updated on: Fri, 05 June 2009 10:58]

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8812 is a reply to message #8804]

Fri, 05 June 2009 15:21

Aida Galoyan
Messages: 79
Registered: May 2007
Location: Dubna

continuous participant

From: *jinr.ru

Hi Mathias,

I can simulate elastic pbar-p events with DPM at min. angle 2.8 mrad. Please, write me, beam momentum of antiprotons and number of events.

Best regards,
Aida

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8840 is a reply to message #8812]

Wed, 10 June 2009 18:18

Aida Galoyan
Messages: 79
Registered: May 2007
Location: Dubna

continuous participant

From: *jinr.ru

Hi all,

I have inserted some improvements in
elastic (hadron+Coloumb+interference) part of DPM.

With this version of DPM, I have generated elastic pbar-p (100000 Events) at various energies for minimal Theta 3 mrad. Ouput-root files are disposed in GSI Linux cluster in public directory
/d/panda02/elastic .
I have removed earlier generated files there.

Aida

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8877 is a reply to message #8840]

Thu, 18 June 2009 10:19

Mohammad Al-Turany
Messages: 518
Registered: April 2004
Location: GSI, Germany

first-grade participant

From: *to.infn.it

Hi,

Aida, can you put your modified version of DPM in the development branch of the repository so that I can modify the DPM direct classes and put all together in SVN trunk?

So as soon as you make it available in the development branch please let me know!

regards

Mohammad

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Re: Elastic pbar-p with Coulomb and hadron scatterings [message #8886 is a reply to message #8166]

Fri, 19 June 2009 15:20

Aida Galoyan
Messages: 79
Registered: May 2007
Location: Dubna

continuous participant

From: *cern.ch

Dear Mohammad,

I will write you after last check of the new DPM.

Before this, the users can apply root-files generated
by new DPM disposed at GSI Linux cluster in public directory:
/d/panda02/elastic
There are simulations of 100000 Events
of pbar-p elastic scatterings (hadron+interf.+Coulomb)
at beam momenta 1.5, 2.0, 6.2, 8.0, 10.1, 15.0, 16.0 GeV/c
at teta_min=3 mrad.

Best regards,
Aida

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